Description Chiefly marine. In brackish water occasionally; rare in freshwater. Distribution: most tropical seas. Very protractile...

Description Chiefly marine. In brackish water occasionally; rare in freshwater. Distribution: most tropical seas. Very protractile mouth. Head scaly but with smooth upper surface. Dorsal and anal fins with a sheath of scales along base. Gill membranes not united to isthmus. Deeply forked tail. [details]

Description Chiefly marine. In brackish water occasionally; rare in freshwater. Distribution: most tropical seas. Very protractile mouth. Head scaly but with smooth upper surface. Dorsal and anal fins with a sheath of scales along base. Gill membranes not united to isthmus. Deeply forked tail. [details]